codan
New Member
Hi Everybody,
I decided to do an electronics course but i am confused with a question they ask.
They say:
A 4700 ohm resistor is rated at .5 Watts. What is the maximum safe working current.
This i am having trouble with as they do not specify a Voltage.
If i use Ohms Law i have
I = The Square Root of P/R
I = Amperes
P = Watts
R= Resistance
But how can i answer the question if i do not know the Voltage value.
If
P = V x I then the Amperage value will change due to the Voltage value.
Eg
1v X .5A = .5Watts
10v X .05A = .5Watts
Am i missing the obvious here?
Thank You
I decided to do an electronics course but i am confused with a question they ask.
They say:
A 4700 ohm resistor is rated at .5 Watts. What is the maximum safe working current.
This i am having trouble with as they do not specify a Voltage.
If i use Ohms Law i have
I = The Square Root of P/R
I = Amperes
P = Watts
R= Resistance
But how can i answer the question if i do not know the Voltage value.
If
P = V x I then the Amperage value will change due to the Voltage value.
Eg
1v X .5A = .5Watts
10v X .05A = .5Watts
Am i missing the obvious here?
Thank You